[SteveJanesch]

Regarding the original post...

Since you mentioned you are more into microcontrollers now, are you looking to build a full-power Victor equivalent, or maybe a smaller version of some kind of pulse-width modulated motor controller for learning and experimentation? There's some magic going on inside a Victor which converts the 1 to 2 ms pulse into the H-bridge drive, which you can skip if you just want to build an H-bridge and drive it straight out of the microcontroller - more accurately, you can pull that bit into the micro-c and play with it. Instead of ganging up power transistors to get to 50 amp current capability, you can start out with a single transistor in each leg and a smaller motor or lower voltage so you go through less cash replacing blown-up parts.

Assuming, that is, that you're still thinking about building this thing...

- Steve Janesch